Call it a speculative mania if you must, but zero interest rates are forcing otherwise cautious cash savers the world over to seek out hard-asset protection for their wealth.

FORBES: Silver Soars As Speculators Dive Into The Devil's Metal

The Busang affair was not, first of all, a speculative frenzy such as the Dutch tulip mania of the 17th century or the South Sea Bubble of the 18th.

ECONOMIST: All that glisters . . .